In the late 1940's and early 1950's "hawt" was an acronym for "having a wonderful time." It was eventually stolen by scenester fucks to mean,"sexy" or "attractive" because of the downfall of american youth.

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horizontal-axis wind turbines; they have the main rotor shaft and electrical generator at the top of a tower, and must be pointed into the wind. Small turbines are pointed by a simple wind vane, while large turbines generally use a wind sensor coupled with a servo motor.